613GC OPERATOR’S MANUAL
23
TROUBLESHOOTING • CUT-OFF SAW WON’T REACH FULL RPM - Air filter or pre filter may be dirty.
• SLOW DIAMOND CHAIN SPEED – Diamond chain tension too tight. Diamond chain should always
be able to be pulled around the guide bar by hand. It is normal for the diamond chain drive links to
hang below the guide bar.
• POOR CUTTING SPEED - Diamonds may be “glazed over”. Make a few cuts in an abrasive material
such as a cinder block to expose the diamonds.
• CHAIN TENSIONER BREAKAGE - Side cover nuts are not tight enough. Torque to 20 ft-lbs
(27Nm).
• WATER NOT FLOWING - Water hose is kinked or supply is not turned on.
• WON’T START – Turn ignition switch on or possible defective spark plug.
• WON’T START – Low compression, less than 120 psi (8 bar). Possible incorrect fuel mixture.
Reference: new = 150 to 180 psi (10 to 12 bar)
used = 140 to 160 psi (9 to 11 bar)
• DIFFICULT TO START – Possible flooded engine. Turn ignition switch on, push choke in, hold
throttle on full with foot and pull starter cord until engine starts.
• DIFFICULT TO START – Possible fouled spark plug. Remove spark plug, clean with wire brush and
re-gap.
• DIAMOND CHAIN BREAKAGE – Diamond chain installed backwards. Bumpers should lead
segments into the cut.
• DIAMOND CHAIN BREAKAGE – Not enough feed pressure while cutting. Avoid letting the cut-off
saw bounce and chatter.